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Physical properties of polymer blends and their theoretical consideration

✍ Scribed by Jeong Seok Oh; Jeong Gyu Jang; Young Chan Bae

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
654 KB
Volume
38
Category
Article
ISSN
0032-3861

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✦ Synopsis

The physical properties of polymer blends and their theoretical consideration based on the double-lattice model (DLM) and a simple rheological equation of state were investigated. Cloud points of poly(ccaprolactone) (PCL)/polystyrene (PS) blends were determined using the thennooptical analysis (t.o.a.) technique. PCL (M, = 125000)/PS(M, = 6200) blends exhibit an upper critical solution temperature (UCST). The adjustable parameter values are r2 = 844.859, E/k = -3 13.092 K, and h/k = 138 1.824 K. For PCL (M, = 15OOO)PS (M, = 840) blends, r2 = 177.560, c/k = -254.163K, and &/k = 1195.827K. The DLM successfully describes and predicts the phase behaviour of polymer blends. Steady-state shear viscosity of PCL/linear low-density polyethylene (LLDPE) blends was also investigated. D.s.c. results showed that there is no miscibility between PCL and LLDPE. A simple rheological equation of state successfully describes and predicts the flow behaviour of the proposed polymer blend.

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